Winterflowering Kniphofias

Tony Avent
Fri, 29 Feb 2008 03:46:47 PST

I would agree that genetic distribution plays a role in Gladiolus 
dalenii as we have seen this first hand.  We have clones that bloom in 
May/June and others that flower in October/November.  Such has not been 
the case with kniphofia.  We were given "earlier flowering forms" of K. 
rooperi and K. sarmentosa that flowered starting in fall and all winter 
when grown about 3 hours south (1 zone warmer).  When we planted them, 
they changed cycles and flowered during the time that we know as normal 
for those species, K. rooperi in the late summer through early October 
and late March for K. sarmentosa.  I've since grown both from numerous 
wild collections, and unlike the gladiolus have seen no difference in 
flowering times.  Thoughts?

Tony Avent
Plant Delights Nursery @
Juniper Level Botanic Garden
9241 Sauls Road
Raleigh, North Carolina  27603  USA
Minimum Winter Temps 0-5 F
Maximum Summer Temps 95-105F
USDA Hardiness Zone 7b
phone 919 772-4794
fax  919 772-4752
"I consider every plant hardy until I have killed it least three times" - Avent

Lauw de Jager wrote:
> Tony,
> As John and Ellen confirm, this must have something to o with   region of
> origin of the various populations.  The same cause of the difference in
> flowering period was noted for Gladiolus dalenii.
> Greetings
> Lauw de Jager
> Le 28/02/08 13:26, « Tony Avent » <> a écrit :
>> I continue to be fascinated by how climate affects flowering time.
>> Kniphofia rooperi flowers here from August-October.
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